By Ming-ko Woo
This booklet provides decade-long advances in atmospheric learn within the Mackenzie River Basin in northern Canada, which encompasses environments consultant of the coldest parts in the world. Collaborative efforts by means of a group of approximately a hundred scientists and engineers have yielded wisdom completely transferable to different excessive range areas in the USA, Europe and Asia.
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Extra info for Cold Region Atmospheric and Hydrologic Studies. The Mackenzie GEWEX Experience: Volume 1: Atmospheric Dynamics
Htm. 2 Cross-disciplinary Collaboration Atmospheric and hydrologic investigations have traditionally been treated as separate research pursuits. MAGS, however, was cross-disciplinary, being a collaborative study that involved scientists and engineers from ten universities and five government research institutions. The research program brought together investigators with divergent background training and experiences in atmospheric and hydrologic fields, in earth sciences and remote sensing, as well as in data processing and modeling.
Daily high temperature can occasionally reach 30oC. One consequence of persistent coldness is the formation and maintenance of permafrost, or ground with temperatures at or below 0oC for at least two consecutive summers. Over 75% of the Basin is underlain by permafrost which is continuous north of the tree-line and discontinuous in the subarctic regions south of tree-line and in the alpine zone (Fig. 1). The entire MRB, including the non-permafrost zones, experiences seasonal ground freezing. Temperature variations in circumpolar regions have been larger than those in the temperate and tropical areas.
Some of the MRB warm core anticyclones transform into cold core low level structures. , cold air damming). The resultant dense cold air over the MRB effectively reduces or eliminates the 30 Szeto et al. sloping effects of the mountains and thereby restraining the sinking and warming of the airflow that passes over the Cordillera (Fig. 4). Curry (1983) hypothesized that the loss of IR radiation at the top of thin lowlevel clouds in cold-core anticyclones could induce cooling at the lower troposphere.